Make him pay for his sins.
"I'm not stupid, Secara. I'm not an idiot, Aaron. I'm not a helpless orphan anymore, so stop trying to manipulate me into doing your bidding, Grayson!"
Reko had no idea those three sentences would leave him slowly dying around the blackened debris of the White Cathedral and the orange raging flames of the accompanying fire. He knew Ace and Aaron could not help him; they suffered grave injuries both before the fire that were inflicted by Grayson, and during the fire, as they escaped, failing to find Reko through the thick smoke and the natural human reflex to ensure one's own life was saved before saving that of another.